A couple months ago I installed a new E3D V6 on my CR-10S. It was quite easy to do but I'm having issues.
I printed out the CR-10 Heavy Duty customisable modular e3D V6 mount Volcano 5015 ABL (https://www.thingiverse.com/thing:2494642) before hand. At first, with 2 side fans running at 100%, I would get thermal runaway. Once I got that figured out I lowered my fan speeds in S3D to 25%.
That seemed to work for smaller jobs but then I did an overnighter... I woke up to find a half printed bottom and a stringy top. Does anyone have some settings to recommend with the E3D V6 and a CR-10? I'm willing to print out a different mount if that will help!